Operating ideas for small mines.

By: Material type: TextTextSeries: Montana Bureau of Mines and Geology. Miscellaneous contributions ; no. 14.Publication details: [Butte] 1956.Description: vii, 81 p. illus., diagrs. 19 cmSubject(s): DDC classification:
  • 622.33
LOC classification:
  • TN275 .S814
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Bibliography: p. 81.

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